@billquinn I mean, both parents can still deal with anything from the kids lives, they just need to communicate with the other parent. This may involve letting the other parent know the contact details of the person running an extracurricular, or sending details of how things work, etc. There's been a few times where I've called places up and say "Hi, I'm such and such's dad, I'm not sure how things work because it's usually his mother that deals with things, but..."
I am fairly certain that a 50/50 split is going to actually decrease the parenting load that I have.
It's different. Not necessarily more or less load, but a different load. The constancy of parenting goes away, and for many people, that's a huge relief. I remember feeling like I never got a break from parenting, but now I get a break every week! But, that's balanced by the fact that, at least while you're single, the load goes up when you do have the kids, and many things become a lot harder, for example, if they're young, you can't just duck down to the shops to quickly get something for their lunches or dinner or whatever, you have to take the kids with you every time, which makes such trips take 10x longer and drain you of 100x more energy.
Also, you can't rely on your ex as much as you did before, there are things that before, you could split, but now you both need to do. You both need to be across their school calendars, for example. You both need to maintain contacts with their friends parents for playdates. etc etc etc.